My cat suffered with chronic conjunctivitis for many months. I felt so helpless. The ointment worked temporarily, clearing the eyes for only three or four days out of the month. I tried vinegar, removed all of the carpets from my home, cleaned my hardwood floors daily and made countless trips to the vet with no long lasting solutions. FINALLY I FOUND THE CULPRIT. Through trial and error, and changing my cats diet, I realized she was allergic to Meow Mix Seafood Medley cat food! I changed brands and she has not had a problem since. That was over 3 months ago and she has been happy and playing since then! What a relief!